Pass nullptr for paintInvalidationState if it can't be used to map geometry.

third_party/WebKit/Source/core/layout/LayoutView.cpp

Index: third_party/WebKit/Source/core/layout/LayoutView.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutView.cpp b/third_party/WebKit/Source/core/layout/LayoutView.cpp
index f1ecdfa63692fe8c7e2134668be174c57723f868..2e243242c277b07bfecacaeefadd0c68c8622202 100644
--- a/third_party/WebKit/Source/core/layout/LayoutView.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutView.cpp
@@ -480,11 +480,14 @@ void LayoutView::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* anc
     mapToVisibleRectInAncestorSpace(ancestor, rect, IsNotFixedPosition, invalidationState);
 }
 
-void LayoutView::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& rect, ViewportConstrainedPosition viewportConstraint, const PaintInvalidationState* state) const
+void LayoutView::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& rect, ViewportConstrainedPosition viewportConstraint,
+    const PaintInvalidationState* paintInvalidationState) const
 {
     if (document().printing())
         return;
 
+    // TODO(chrishtr): fix PaintInvalidationState offsets for LayoutViews.
+
     if (style()->isFlippedBlocksWritingMode()) {
         // We have to flip by hand since the view's logical height has not been determined.  We
         // can use the viewport width and height.
@@ -509,7 +512,7 @@ void LayoutView::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* anc
         return;
 
     if (LayoutBox* obj = owner->layoutBox()) {
-        if (!state || !state->viewClippingAndScrollOffsetDisabled()) {
+        if (!paintInvalidationState || !paintInvalidationState->viewClippingAndScrollOffsetDisabled()) {
             // Intersect the viewport with the paint invalidation rect.
             LayoutRect viewRectangle = viewRect();
             rect.intersect(viewRectangle);